Typewriting machine



Jan. 25, 1927. 1,615,598

J. A. B. SMlTH TYPEWRITING MACHINE' Filed Jan. 1925 Patented Jan. 25, 1927.

UNITED STATES PATENT OFFICE.

JESSE A. B. SMITH, OF STAMFORD, CONNECTICUT, ASSIGNOR TO UNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPEWRITIN G MACHINE.

Application filed January 22, 1925. Serial No. 3,944.

This invention relates to typewriting machines, and more particularly to means for severing typed portions from a continuous work-web fed around the platen.

The invention is in the nature of improvements which may be used with devices disclosed in my Patent No. 1,362,54 1, dated December 14, 1920. It is herein illustrated as applied to an Underwood continuous billing machine, illustrated in the ernery & Smith Patent No. 1,132,055, dated March 16, 1915.

A feature of the present invention relates to improvements to facilitate severing the web. To this end, there is provided means to clamp the web or paper before severing, said means being adapted to engage the web at both sides of a line along which it is to be severed, so as to present the web in a straight, unyielding condition to the knife, which may then be drawn from one side to the other of the machine to readily sever the web.

The clamp may be in the nature of a bar having a slot therein through which the knife extends, said bar being pivotally supported, so that it may be swung from an ineffective position down against a papertable at the delivery side of the platen and over which table the web is conducted, said paper-table having a slot therein through which the knife extends during a severing operation.

A circular knife is used which is rotatively supported on a finger-piece supported on a shaft and by which finger-piece the knife may be first swung downwardly, against the tension of a suitable spring, to its effective position, and then it may be drawn from one side to the other of the machine to sever the web. To positively rotate the knife while it is being drawn across the web, it is provided with a pinion geared to a suitable rack, which rack may be formed on the clamping bar. There is also provided a roller on the knife to press the clamping bar tightly against the table to hold the paper when the knife is moved to its effective position and operated by the supporting finger-piece.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a sectional side view of the carriage of an Underwood continuousbilling typewriting machine, showing the inventlon applied thereto, the knife being in its raised or ineffective position.

Flgure 2 is a diagrammatic view similar to Figure 1, showing the knife swung to its effective position and the work-web held by the clamp.

Flgure 3 is a detail view, showing the construction of the knife and its support, the parts being separated from each other for clearness.

Figure 4 is a detail end view of the knife, showing the manner of connecting it with its driving pinion.

Figure 5 is a perspective view of a portlon of the platen-carriage, showing the invention applied thereto.

In the Underwood fan-fold typewriting machlne, a platen 10 is revolubly mounted in a swing-frame which includes end plates 11 and 12 journaled to a front shaft 13 extending across the carriage of the machine, so that the platen may be swung forwardly in line with the work-sheet on the fan fold table and clear of the feed-rolls 14; and 15, whlch usually co-operate with the platen for feeding the work-sheet in line-.

space direction.

The platen, which is revolubly mounted on its axle 16, is shown in its normal positlon, with a web 17 drawn from the rear over a table 18 down around the platen past the feed-rolls to the printing line, and then up and rearwardly over a front table 19 upon which the cutting attachment is mounted. In the usual operation of these machines, the web is line-spaced after each line of typing until the leading edge thereof strlkes a gage 20, which is slidably mounted on a supporting member 21 fast to the front table 19.

l/Vhen the web has been fed to the gage 20 by successive line-spacing, it is desired to cut it off so that a new section of the web may be typed upon, and soon. To this end, means are provided whereby the web may be clamped against the table 19 at both sides of a slot 22 in said table, while at the same time a revolubly mounted and positively driven circular knife 23 having a cutting periphery is forced through the web and mog ed along'the slot 22 thus severing the we The web is held against the table 19 by means of the pressure pad or bail 24, pivotally mounted on arms by means of the pins 26. slot 27 through which the knife 23 reaches the web 011 the table, the uppermost edge of the bail being operatively connected to the knife by means of a rack 28 engaging a pinion 29 fast to the knife 23.

Normally the bail 2% is held in position, as shown in Figure 1, by means of springs 30 forcing the arms 25 upwardly away from the table, the upward travel of the arms being limited by pins 31 striking the sup porting brackets 32 on which a cross-bar 33 is mounted.

The knife 23 is revolubly mounted on a bracket 34, which is in turn rockably and slidably mounted on the bar 33 by means of a journal member 35 which forms an integral part of said bracket. The knife, as shown in Figure 3, comprises a hub 36 and a nut 37 screwed on a rearwardly-extending portion 38, clamping the knife thereinbetween.

It will be noted that the hole in the knife is designed to fit two flats 39 in the hub 36 to prevent the knife from rotating relatively to its hub. The hub 36, upon which the circular knife is mounted, is provided with a concentric hole 41 for the reception of a circular extension or stub-shaft integral with the bracket 34 The knife unit is thus revolubly mounted, and to keep this unit in place a screw 42 is fitted into atapped hole d3 at the end of the circular extension 40, the head of said screw being a little larger than the hole 41. The bracket 3% is forced downwardly by gripping a knife-guard 4a which is fast to the bracket by means of the screws 45. The periphery of the nut 37 engages with the edge 46 of the bail 2a to force the same downwardly against the pressure of the springs 30, so that, while the bail 2a is held against the table gripping the work-sheets thereinbetween, the knife is slid along the table, and at the same time is forcibly rotated by the pinion 29 engaging the rack 28.

It will be noted that this device is detachably mounted on the typewriting machine by means of screws 47 which fasten the table 19, upon which the device is mounted, to the brackets $28 which are in turn fast to the end plates 11 and 12. Another feature is that the device may itself be detached from the table 19 without removing the table from the machine by loosening screws 49 which hold the springs 30 and the brackets 32 fast to the table.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a paper-cutter, the combination of a table, a revolubly mounted and positive- Said bail 24 is provided with aly driven circular knife having a cutting periphery, a slot in said table to clear the path of said knife, and means for holding sheets to be severed against the table on both sides of the knife, said means comprising a clamping bar having aslot therein through which the knife may reach the sheets to be severed.

2. In a paper-cutter, the combination of a table, a circular knife having a cutting periphery, means to guide the knife along said table including a cross-bar adjacent thereto, a housing revolubly supporting the knife, and said housing being rockably and slidably mounted 011 said bar, a slot in said A table in the path of said knife through which the knife protrudes, means for positively rotating the knife, means for effectively clamping sheets of paper against the table on both sides of the slot, said last-mentioned means comprising a pressure pad disposed between the hub of the knife and the table, said pressure pad including a slot through which the knife may reach the sheets of paper, and having teeth out therein form ing a rack disposed to engage with a pinion cut in the hub of said knife and forming an integral part thereof, means whereby the pressure pad may be forced against the table, comprising a hub-extension bearing upon the pressure pad, and means to hold the pressure pad and the knife away from the table.

3. A sheet-cutting device comprising a table, a shaft parallel to said table and overlying the same, a bail-piece rockably mounted on said shaft for effectively holding sheets of comparatively soft material on both sides of a slot in the table, a spring operatively connected to said bail piece to normally hold the same away from the table, a housing rockably and slidably mounted on said shaft for carrying a circular knife revolubly mounted thereon, a hub on said knife co-operating with the bail-piece to hold the latter against the table through pressure applied to said housing, and means including a stationary rack and a toothed pinion fast to the hub of the knife to p0sitively rotate the knife when the same is slid along the slot in the table to sever the sheets.

l I11 a typewriting machine, the combinatlon with a revoluble platen about which worksheets are adapted to be passed, of a paper-table above said platen including a slot, a revolving knife adapted to be carried along said slot, a rack adjacent said table forming an integral part of a pressure pad adapted to hold the work-sheets fast against the table on both sides of said slot, and a pinion on said revolving knife meshing with said rack to be turned thereby as the knife is moved along the table.

5. In, a typewriting machine, the combination with a revoluble platen, of a removable paper-table above said platen, a transverse slot in the table, a cross-bar detachably mounted on said table, a bracket rockably and slidably mounted on said bar and provided with a housing, and a circular knife having a cutting periphery extending through the slot in said table and rotatably mounted within said housing.

6. In a typewriting machine, the combination with a rotatable platen, of a removable paper-table above said platen, a transverse slot in the table, a cross-bar detachably mounted on said table, a bracket rockably and slidably mounted on said cross-bar and provided with a housing, a circular knife having a cuttin periphery extending through the slot in sald table and rotatably mounted within said housing, a pair of arms rockably mounted on said cross-bar, and clamping and guiding means pivotally mounted between said pair of arms.

7 In a typewriting machine, the combination with a revoluble platen, of a removable paper-table above said platen, a transverse slot in the table, a cross-bar detachably mounted on said table, a bracket rockably and slidably mounted on said cross-bar and provided with a housing, a circular knife having a cutting periphery extending through the slot in said table and rotatably mounted within said housing, a pair of arms rockably mounted on said cross-bar, a bailmember extending across the paper-table pivotally mounted between the pair of rockably mounted arms, and a slot in said bailmember coinciding with the slot in the table when the bail is positioned for a papercutting operation, said bail clamping the sheets to be severed against the table along each edge of the first-mentioned slot, the slot in said bail providing guiding means for a circular knife upon shding movement of the bracket-supporting circular knife.

8. In a typewriting machine having a revoluble platen and means for feeding a work-sheet therearound, a table at the delivery side of said platen, a cross-bar detachably mounted on said table, a transverse slot in said table, a bracket rockably and slidably mounted on said cross-bar and provided with a housing, a circular knife having a cutting periphery extending through the slot in said table and rockably mounted in said housing, a bail-member rockably and resiliently mounted on the cross-bar, and a transverse slot in said bail-member for receiving and guiding a circular knife, said bail-member tending to urge the bracket and circular knife to an inoperative position.

JESSE A. B. SMITH. 

